jimfist - to "mimic" the Ultra-HI and Ultra-LO, just use two PEQ blocks.
Have one that that has +9dB @ 8Khz with a roughly Q of 1.1, set to Peaking mode. You can make any of the 5 frequency sets this, and leave the rest alone. Engage/disengage for Ultra-HI
Have one that has +2dB @ 40Hz (0.500 Q, Peaking, though may want to try Shelving too), and a -10dB @ 500Hz (0.707 Q, Peaking). Use two of the frequency sets for this (can just use the first page, 1+5). Engage/disengage for Ultra-LO.
If you find yourself commonly running with U-LO and U-HI engaged all the time, you can combine them into one PEQ block, too.
I may make a guide on getting the SV BASS close to a "true" SVT. I own both a 1969 (yes, real deal 1969 with the 6146As) and a 2000's SVT-CL. It'll be pretty daunting though, and I don't know when I'll get time to... but I'll add it to my list of "things I can do for the FAS community"